| (19) |
 |
|
(11) |
EP 0 694 510 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
21.08.1996 Bulletin 1996/34 |
| (43) |
Date of publication A2: |
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31.01.1996 Bulletin 1996/05 |
| (22) |
Date of filing: 25.07.1995 |
|
| (51) |
International Patent Classification (IPC)6: C04B 37/00 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB |
| (30) |
Priority: |
29.07.1994 US 283311
|
| (71) |
Applicant: Saint-Gobain/Norton
Industrial Ceramics Corporation |
|
Worcester, MA 01615-0138 (US) |
|
| (72) |
Inventors: |
|
- Kapoor, Rakesh R.
Shrewsbury, MA 01545 (US)
- Nagy, Bela G.
Acton, MA 01720 (US)
- Bigelow, Louis K.
Boylston, MA 01545 (US)
|
| (74) |
Representative: Richebourg, Michel François |
|
Cabinet Michel Richebourg,
"Le Clos du Golf",
69, rue Saint-Simon
F-42000 Saint Etienne
F-42000 Saint Etienne (FR) |
|
| |
|
| (54) |
Brazing of diamond film to tungsten carbide |
(57) The reliability of a braze joint formed between a diamond film and a tungsten carbide
body is increased by use of a vanadium containing braze. The braze joint exhibits
an average shear strength greater than about 40,000 pounds per square inch, (276 MPa)
and the braze exhibits a contact angle with the diamond film of less than about 15°.